bi·la·bi·al /(ˌ)baɪˈlebiəl/
  雙脣音[如p;h;m等]
  bi·la·bi·al /(ˈ)baɪˈlebɪəl/ 形容詞
  雙脣的
  bilabial
       adj : of or relating to or being a speech sound that is
             articulated using both lips; "bilabial fricatives"
       n : a consonant that is articulated using both lips; /p/ or /b/
           or /w/